package com.example.sys.service;

import com.example.sys.entity.User;
import com.baomidou.mybatisplus.extension.service.IService;

/**
 * <p>
 *  服务类
 * </p>
 *
 * @author ZhengDing
 * @since 2022-02-19 22:26:17
 */
public interface UserService extends IService<User> {
    
    String login(String username, String password);
    
    boolean isUserNameExist(String username);
}
